Some task

//https://www.e-olymp.com/uk/problems/1017

#include <stdio.h>
#include <math.h>
#include <algorithm>

using namespace std;

struct NUM {
    int sign;
    int intr;
    int numr;
    int denr;

    NUM() {
        sign = 1;
        intr = 0;
        numr = 0;
        denr = 1;
    }
};

void printNum(NUM n) {
    if (n.intr == 0 && n.numr == 0) printf("0");
    else {
        if (n.sign == -1) printf("-");
        if (n.intr != 0) printf("%d ", n.intr);
        if (n.numr != 0) printf("%d/%d", n.numr, n.denr);
    }

    printf("\n");
}

int nod(int a, int b) {
    if (a == b) {
         return a;
    }
    while (a && b) {
        if (a > b) {
            a %= b;
        } else {
            b %= a;
        }
    }
    return a + b;
}

int nok(int a, int b) {
    return a*b/nod(a, b);
}

int sign(int a) {
    return (a < 0) ? -1 : 1;
}

NUM simplify(NUM n) {
    while (nod(n.numr, n.denr) != 1) {
        int c = nod(n.numr, n.denr);
        n.numr /= c;
        n.denr /= c;
    }
    return n;
}

NUM fracint(NUM n) {
    int adb = n.numr/n.denr;
    n.intr += adb;
    n.numr -= adb*n.denr;
    return n;
}

NUM createNum(int i, int a, int b) {
    NUM n;

    n.sign = sign(i)*sign(a);
    n.intr = abs(i);
    n.numr = abs(a);
    n.denr = b;

    return simplify(fracint(n));
}

NUM readNum() {
    int a = 0, b = 0, c = 1;
    char s1;

    scanf("%d%c", &a, &s1);

    if (s1 == ' ' || s1 == '/') {
        if (s1 == '/') {
            b = a;
            a = 0;
            scanf("%d", &c);
        } else {
            scanf("%d/%d", &b, &c);
        }
    }

    return createNum(a, b, c);
}

int comDen(NUM a, int c) {
    return (a.intr*c + a.numr*c/a.denr);
}

NUM mult(NUM a, NUM b) {
    return createNum(0, a.sign * b.sign * comDen(a, a.denr) * comDen(b, b.denr), a.denr * b.denr);
}

NUM div(NUM a, NUM b) {
    swap(b.numr, b.denr);
    return mult(a, b);
}

NUM sum(NUM a, NUM b) {
    int cnok = nok(a.denr, b.denr);
    return createNum(0, a.sign*comDen(a, cnok) + b.sign*comDen(b, cnok), cnok);
}

NUM dif(NUM a, NUM b) {
    b.sign *= -1;
    return sum(a, b);
}

NUM calc(NUM a, char s, NUM b) {
    swap(a, b);

    if (s == '+') return sum(a, b);
    if (s == '-') return dif(a, b);
    if (s == '*') return mult(a, b);
    return div(a, b);
}

char readOperation() {
    char s;

    scanf("\n%c", &s);
    return s;
}

int main() {

    printNum(calc(readNum(), readOperation(), readNum()));

    return 0;
}